Stresses in Layered Shells of Revolution

1st Edition

Authors: V. Kovarik
Hardcover ISBN: 9780444988935
eBook ISBN: 9781483291772
Imprint: North Holland
Published Date: 1st June 1989
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Table of Contents

I. Basic Terms, Relations and Assumptions of the Theory of Elastic Orthotropic Shells. Some terms. General relationships of the theory of elastic orthotropic shells. Specific concepts of the theory of layered shells. Basic theory of sandwich shells. On possible formulations of simplified theories. Some limit processes. II. Membrane Theory of Layered Shells. Introductory remarks and working hypotheses. Cylindrical shells. Spherical shells. Conical shells. Thermoelastic membrane stresses. Applicability of the membrane theory. III. Axisymmetric Problems of the Bending Theory of Elastic Layered Cylindrical Shells. Introductory remarks and basic assumptions. Formulation and general solution of the problem. Limit processes for other types of fundamental systems. Derivatives of the members of fundamental systems. On the possibility of separating the membrane and bending states of stress. Generalized membrane state of stress. Boundary disturbances in long shells. Boundary disturbances in short shells. Thermoelastic stresses in shells with temperature dependent moduli E = E(T). IV. General Loading of Elastic Layered Cylindrical Shells. Introductory remarks and basic relations. Formulation of the problem. General solution of the problem. Axisymmetric part of the solution. Asymmetric part of the solution. Final solution for the given shell. V. Viscoelastic Structures. Introduction and notation. Hereditary theory. General formulation of the viscoelastic problem. On the possibility of separating variables. Elastic-viscoelastic analogy for homogeneous structures. Constructions of layered structure. VI. Complementary Chapters. Fourier series. Simple rheological materials (bodies). Schwartz distribution theory. References. Author Index. Subject Index.


Shell structures are key components in a very wide range of engineering enterprises. The theory of layered shells of revolution under the quasistatic action of loading and temperature is the subject of this book. The shells treated here are in general of an asymmetric sandwich structure. A linear theory is developed which allows for a transition to shells with less layers, that is two-layered and homogeneous structures.

The first half of the book is concerned with orthotropic elastic shells. In particular, it includes the membrane theory of cylindrical, spherical and conical shells, and the bending theory of cylindrical shells, storage tanks and pressure-vessels. In each of the numerical examples considered, an attempt is made to map different regimes of structural behaviour.

The second half of the book is devoted to viscoelastic shells. First the time-invariant hereditary theory is presented, describing the response of viscoelastic materials. According to the correspondence principle of this theory the actual viscoelastic shell may be replaced by a conjugate elastic one. In this way many of the results from the first half of the book can be put to good use even for viscoelastic shells. The time-dependent material characteristics are taken into account by means of the time-temperature principle.

In an appendix (Part VI), the mathematical prerequisites are presented. With viscoelasticity comes the need to employ further mathematical disciplines; integral equations and integral transformations are usually encountered. Here, instead, a different concept has been chosen, the distributional concept of Laurent Schwartz, which allows many problems to be tackled in a simple formal way. In discussing the distribution theory, a level accessible to a technical reader has been maintained.

The book is intended as a textbook for students and teachers of structural and aeronautical engineer


© North Holland 1989
North Holland
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About the Authors

V. Kovarik Author